JPH0482568A - Bone healing promoter - Google Patents

Abstract

PURPOSE:To achieve a promotion of a formation of a temporary bone and a healing of a bone efficiently by adjusting a phase of an ultrasonic vibration induced in a broken part of a bone with respect to a phase of a current to be induced in the broken part thereof to select an effective treating pattern at the broken part thereof. CONSTITUTION:Electrodes 2a and 2b connected to both output ends of a high frequency generator 1 are arranged on a skin as opposed to each other sandwiching a broken part of a bone. Then, an ultrasonic oscillation element 4 is arranged on the skin of the broken part of the bone at the right angle to a direction of opposing the electrodes 2a and 2b to each other. When a power source switch is closed to an ON position, a high frequency is applied between the electrodes 2a and 2b and at the same time, an ultrasonic wave is radiated to the broken part of the bone from the ultrasonic oscillation element 4. As an ultrasonic wave is radiated to the broken part of the bone, a piezoelectricity is generated by an ultrasonic vibration induced in the broken part of the bone. Then, a phase adjuster 5 is adjusted to vary a phase of a high frequency output to be fed to the ultrasonic oscillation element 4 thereby allowing the setting of an effective treating pattern at the broken bone part from a correlational relationship thereof with a phase of an induced current by a high frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a bone fusion promoting device suitable for use in fracture treatment.

``Prior Art'' Traditionally, bone union promoting devices used for fracture treatment include direct current electrical stimulation, alternating current electrical stimulation, and pulsed electromagnetic field stimulation (P E M F s;
ctr.

magnetic F 1leds) method, or capacitive induction (CCE F; capacitively co
A method based on the "upled electric field" method has been developed.

Bone union promoting devices using direct current electrical stimulation and alternating current electrical stimulation involve inserting two electrodes near the fracture site and passing a current between them, while bone healing promoting devices using pulsed electromagnetic field stimulation method , a pulsed electromagnetic field is irradiated from outside the body toward the fracture site to generate an induced current in the fracture site. In addition, a bone healing promoting device using a capacitive induction method involves attaching two electrodes to the skin surrounding the fractured part, sandwiching the fractured part, and applying high frequency waves between these electrodes.

"Problem to be Solved by the Invention" By the way, among the conventional bone fusion promoting devices mentioned above, those using the direct current stimulation method and the alternating current stimulation method require electrodes to be inserted directly into the living body as described above. Therefore, there is an advantage that electrical stimulation energy can be concentrated at the fracture site. However, since the electrode is inserted into the living body, it has the disadvantage of causing physical pain. On the other hand, with pulsed electromagnetic field stimulation method and capacitive induction method,
Since there is no need to insert electrodes into the living body, there is an advantage that the burden on the patient is light. However, it is difficult to efficiently concentrate electrical stimulation energy on the fracture site.
A disadvantage is that temporary placement and bone union take a considerable amount of time.

This invention was made in view of these circumstances,
The object of the present invention is to provide a bone growth promoting device that is non-invasive and can perform temporary placement and bone union in a short period of time.

"Means for Solving the Problem" The invention according to claim 1 provides a bone fusion promoting device comprising a high frequency generator, an electrode to which the output of the high frequency generator is applied, and an ultrasonic oscillator. The invention according to claim 2, further comprising a phase variable means for changing the phase of the output supplied to the ultrasonic oscillator with respect to the phase of the output supplied to the electrode, In addition to the structure of the invention according to claim 1, the output of the high frequency generator applied to the electrode is set to 1/2'' (n is 1.2.3·
・-integer) is provided with frequency dividing means for dividing and applying the frequency.

"Function" According to the configuration described in claim 1, the phase of piezoelectricity caused by ultrasonic vibrations induced in the fractured part can be adjusted with respect to the phase of the high-frequency current induced in the fractured part, so that It is possible to select effective treatment options and to perform temporary placement efficiently.

Further, in the configuration according to the second aspect, since the high frequency output supplied to the electrodes can be frequency-divided, the pattern of electrical stimulation can be set to an optimal one.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a bone fusion promoting device according to a first embodiment of the present invention. The bone fusion promoting device in this embodiment employs the above-mentioned capacitance induction method.

In this figure, l is a high frequency generator, 60KHz
generates a high frequency of 25~10Vp,
It is possible to arbitrarily adjust between p. Moreover, the frequency can also be changed arbitrarily. 2 a,
2b are electrodes, which are connected to both output ends of the high frequency generator l via cords 3a and 3b. 4 is an ultrasonic oscillator. In this case, the ultrasonic oscillator 4 is equipped with a mechanism (path shown) that converts the ultrasonic energy into a beam.

5 is a phase shifter, which connects the high frequency generator 1 to the ultrasonic oscillator 4.
change the phase of the high-frequency output supplied to the Reference numeral 6 denotes a power supply unit that supplies power to each part of the apparatus.

In the bone fusion promoting device configured in this way, as shown in FIG. 4 is placed on the skin of the fracture in a direction perpendicular to the direction in which the electrodes 2 a and 2 b face each other. After performing each arrangement, when a power switch (not shown) is turned on, a high frequency wave is applied between the electrodes 2a and 2b, and at the same time, ultrasonic waves are emitted from the ultrasonic oscillator 4 toward the fracture site. is emitted. When ultrasonic waves are emitted toward the fracture, piezoelectricity is generated by the ultrasonic vibrations induced in the fracture. next,
The phase shifter 5 is adjusted to change the phase of the high frequency output supplied to the ultrasonic oscillator 4, and an effective treatment pattern for the fracture is set based on the correlation with the phase of the current induced by the high frequency.

Next, FIG. 3 is a block diagram showing a schematic configuration of a bone fusion promoting device according to a second embodiment of the present invention.

This second embodiment has the same configuration as the first embodiment described above, except that a frequency divider 7 is provided between the output end of the high frequency generator l and the electrodes 2a and 2b. .

The frequency divider 7 divides the output of the high frequency generator l by 1/2'' (n is 1
, 2.3... integers),
For example, if n=4 and the frequency of the output of the high frequency generator l is I MHz, the frequency is divided into a frequency of 62.5 KHz. In this case, it is said that the frequency of electrical stimulation that is effective for promoting bone union is preferably 60 KHz, and the optimal ultrasonic frequency is IM Hz to 1.5 M) Iz. Therefore, the output frequency of the high frequency generator l is I
MHz, the output of this frequency is directly supplied to the ultrasonic oscillator 4, and this! To make the MHz high frequency output l/24, use the 62.5 KHz high frequency output or electrode 2.
a, 2 b.

As described above, the bone fusion promoting device according to the second embodiment has an electrical stimulation pattern determined by the electrical characteristics of each tissue within a living tissue, and an ultrasonic energy administration pattern determined by the ultrasound characteristics within the living tissue. Electrical stimulation and ultrasonic stimulation can be effectively combined to administer the targeted fracture site.

"Effects of the Invention" As explained above, since the present invention is configured as described above, it produces the following effects.

According to the bone fusion promoting device according to claim 1, since the phase of the ultrasonic vibration induced in the fractured part can be adjusted with respect to the phase of the current induced in the fractured part, Seven effective treatments can be selected, and temporary placement and bone union can be promoted efficiently.

Further, according to the bone fusion promoting device according to claim 2, the output of the high frequency generator supplied to the electrode can be divided into ly'2'', so that the electrical stimulation pattern and the ultrasonic The energy administration pattern can be optimally set.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of a bone fusion promoting device according to a first embodiment of the present invention, FIG. 2 is a diagram showing a state in which the first embodiment is used, and FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a schematic configuration of a bone fusion promoting device according to an embodiment. 1... High frequency generator, 2 a, 2 b... Electrode, 4... Ultrasonic oscillator, 5... Phase shifter (phase variable means), 6... - Power supply section, 7... Frequency divider (frequency division means).

Claims (2)

[Claims] (1) In a bone fusion promoting device comprising a high frequency generator, an electrode to which the output of the high frequency generator is applied, and an ultrasonic oscillator, the ultrasonic oscillator A bone fusion promoting device comprising: a phase variable means for changing the phase of an output supplied to the bone fusion device. (2) A frequency dividing means is provided for dividing the output of the high frequency generator applied to the electrode into 1/2^n (n is an integer of 1, 2, 3, etc.) and applying the divided frequency. The bone fusion promoting device according to claim 1, characterized in that: